Boiler.



No. 778,617. PATENTED DEC. 27, -1904.

F. S. WHITELAW.

BOILER.

APPLICATION FILED MAY 31, 1904.

2 SHEETS-SHEET 1.

mu I 3 y HIM.

PATENTED DEC. 27, 1904. P. S. WHITELAW.

BOILER.

APPLICATION FILED MAY 31, 1904.

2 SHEETSSHEET 2.

Q2: iif laf w UNTTED STATES Patented December 27, 1904.

PATENT OFFICE.

FRANK S. IVHITELAIV, OF DETROIT, MICHIGAN, ASSIGNOR TO AMERICAN RADIATOR COMPANY, A CORPORATION OF NEW JERSEY.

BOILER.

SPECIFICATION forming part of Letters Patent N 0. 778,617, dated December 27, 1904, Application filed May 31,1904. Serial No. 210,506.

1'0 (1]! whmit it may concern:

Be it known that I, FRANK S. l/VHITELAW, a citizen of the United States, and a resident of Detroit, county of lVayne, and State of Michigan, have invented certain new and useful Improvements in Boilers, of which the following is a specification and which are illustrated in the accompanying drawings, forming a part thereof.

This invention relates to sectional boilers used in connection with steam or hot-water heating systems.

The object of the invention is to simplify and improve the construction of heaters of this type, as well as to increase their etficiency and durability; and it consists in the device hereinafter described and which is illustrated in the accompanying drawings, in whicl1- Figure 1 is a front elevation, partly in transverse vertical central section. Fig. 2 is a plan view of an intermediate section of the boiler. Fig. 3 is an inverted plan of the same ele ment. Fig. 1 is a sectional view on the line A at of Fig. 2. Fig. 5 is a sectional view on the line 5 5 of Fig. 1. Fig. 6 is a bottom plan of the fire-pot section. Fig. 7 is adetail sectional view of the same on the line 7 7 of Fig. 6, and Fig. 8 is a detail central vertical section on a plane passing through the back 0 of the boiler.

The boiler is shown as comprising a base 10, a tire-pot section 11, a dome 12, and an intermediate section 13. As is usual in boilers of this type the walls of the tire-pot section, the dome, and the intermediate section are hollow, forming the water-chamber. The base is of any desired form and serves merely as a support and an ash-pit.

A plurality of water-arches 14 spring from 4 the side walls of the lire-pot section 11 and meet in the center, forming a crown-sheet 15 directly over the fire. Flue-apertures 16 are located between the arches 14: and surround the crown-sheet 15. One or more eductionpassages 17 lead upwardly from the waterchamber of the. tire-pot section. Preferably two such passages are provided, one at each side. A return-pipe 18 from the circulating system enters the water-chamber of this section near its bottom, and there is also pro- 5 vided a water-supply pipe 19, entering such chamber near its bottom.

At 20 is shown an additional nipple for the connection of a return-pipe similar to that shown at 18.

At 21 is shown a return-passage entering the water-chamber of the fire-pot section at the top and adapted to communicate with a passage leading from the water-chamber to the dome of the boiler.

The dome-section 12 is chambered and is provided with eduction-pipes,as 22 23, adapted to lead to the circulating system, inductionpassages,as 24,0ommunicating with the waterchambers of the lower sections of the heater, and a return-passage 25, adapted to be brought into communication with the passage 21 of the fire-pot section through a suitable passage cored in the Walls of the intermediate section or sections. The dome-section 12 is also pro- 7 vided with the usual smoke-fines 26.

The intermediate section 13, which may of course be duplicated for the purpose of increasing the height of the boiler, is adapted to fit between the fire-pot and dome sections and has formed in its walls passages, as 27, forming continuations of the passages 17 and 2A of the tire-pot and dome sections, and a passage 28, forming a continuation of the passages 21 and 25 of said section. 0

In assembling the several sections push-nipples 29 30 are inserted in the passages 27 28 and enter the corresponding passages of the fire-pot and dome sections, the outer faces of these rings tapering in both directions and 5 their size being such that as the sections are forced together a tight joint is formed. Apertured ears 81 32 are formed on the fire-pot and dome sections, respectively, for the engagement of draw-rods 33, by means of which 9 the several sections are securely clamped together, so as to insure water and air tight joints, a tight fit being the better insured by forming the meeting faces of the several sections with intercalating tongues and grooves.

The intermediate section 13, while comprising a single casting, is, in effect, a double section, forming a lower and an upper water chamber, as shown at 34. 35, respectively, which cross the interior of the boiler. These two sections are spaced apart. The lower one is provided central flue-openings 36 and the upper one with marginal flue-apertures 37, thereby with the intervening space between the chambers forming a tortuous passage for the vapors of combustion. The upper and lower chambers 34 35 are connected by waterlegs 38, which enter the upper chamber at its center, thus leading them across the flue-passages of the section. The water-chambers of the section 13 are open to the passages 27, through which the circulation is upward, but are cut off from the passage 28, through which the circulation is downward.

The construction of the boiler as described not only provides very extensive heating-surfaces, but it brings the water to be heated to the hottest portions of the boiler and provides for rapid circulation through all of the parts. The return-pipe 18, leading from the radiating system, enters the water-chamber of the fire-pot section approximately at its bottom, thereby delivering the cooled water to the fire-pot walls, which are directly in contact with the burning fuel. The water in the upper part of the chamber of the lire-pot section--that is to say, over the crown-sheet 15 is quickly heated and raised to a steaming temperature with a sharp fire and of course is rapidly carried away by the expansion. The water-supply to this portion of the fire-pot chamber is mainly through the passage leading from the dome at the rear of the boiler, while the hot water rises both from the side walls and from the arch of the lire-pot section to the dome through the passages at the side of the boiler.

It will be seen that in addition to the cycle of circulation comprising the boiler and the radiating system, with its service and return pipes, the former leading from the dome of the boiler and the latter returning to the base, its fire-pot section, there is a second and distinctly separate cycle of circulation comprised wholly within the boiler. This second cycle leads from the crown-sheet of the fire-pot section upwardly through the ducts communieating with the chamber of the intermediate section and leading to the dome and thence downwardly through the comparatively cool duct at the rear of the boiler, which does not communicate with the chamber of the intermediate section, and delivers the water directly to the upper part of the chamber of the fire-pot section, and hence to the crownsheet of that section. As the water flows upwardly from the tire-pot to the dome-section it is deflected through the two water-chambers of the intermediate section 13 by reason l of the circulation of the vapors of combustion through theflues of this section, and particularly by reason of the disposition of the waterlegs 38 across these flues.

I claim as my invention 1. In a boiler, the combination of a plurality of chambered sections arranged in vertical order and having their chambers connected, such sections having a plurality of passages formed in their walls, the corresponding passages ot' the several sections being in communication, such passages being open to the chambers of the top and bottom sections of the boiler, and one of such passages being cut off from the chamber of the intermediate section thereof.

2. In a boiler, the combination of a plurality of chambered sections, the lower section thereof forming the tire-pot and having its top crossed by water-arches forming a part of its chamber, passages connecting the chambers of the several sections, and a return-passage leading from the chamber of the top section to that of the bottom section and entering the same on a level with the water-arches.

3. In a boiler, the combination of a plurality of chambered sections, the lower section thereof forming the tire-pot and having its top crossed by water-arches forming a part of its chamber, passages connecting the chambers of the several sections, a return-passage leading from the chamber of the top section to that of the bottom section and entering the same on a level with the waterarches, an eduction-pipe leading from the top section, and a return-pipe entering the chamber of the bottom section at the base thereof.

4:. In a boiler, an integral double sectionits two parts being spaced apart and united by central and marginal water-legs and having smolzefiues therethrough, such fines being central as to one and marginal as to the other.

5. In a boiler, an integral double section having its two parts united by central waterlegs and having marginal induction and eduction ports and being provided with an independent water-passage.

6. In a boiler, in combination, a fire-pot having its side walls and dome chambered; a plurality of water-sections above the fire-pot, the lire-pot chamber being connected with the upper sections in series; a return-passage leading from the upper section to the dome of the fire-pot; an eduction-pipe for connecting the upper section with a circulating system; and a return-pipe entering the chamber of the firepot walls at its base.

FRANK S. VVHITELAVV.

Witnesses:

WILLIAM J. HENDRICKS, Gno. L. DIXON. 

